Gravesande, Willem Jacob 's, Physices elementa mathematica, experimentis confirmata sive introductio ad philosophiam Newtonianam; Tom. 1

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            <s xml:id="echoid-s17027" xml:space="preserve">
              <pb o="(134)" file="0660" n="729" rhead="PHYSICES ELEMENTA"/>
            ut cum ſemidiametro Telluris conferantur; </s>
            <s xml:id="echoid-s17028" xml:space="preserve">& </s>
            <s xml:id="echoid-s17029" xml:space="preserve">Paralaxis pen-
              <lb/>
            det à ratione, quam ſemidiameter Telluris ad diſtantiam Pla-
              <lb/>
            netæ habet; </s>
            <s xml:id="echoid-s17030" xml:space="preserve">idcirco ipſius Martis, in oppoſitione cum Sole,
              <lb/>
              <note position="left" xlink:label="note-0660-01" xlink:href="note-0660-01a" xml:space="preserve">1108.</note>
            Paralaxis obſervationes ſubtilliſſimas effugit.</s>
            <s xml:id="echoid-s17031" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s17032" xml:space="preserve">Ubi Parallaxis datur, adſcenſu corporis ſupra horizontem
              <lb/>
              <note position="left" xlink:label="note-0660-02" xlink:href="note-0660-02a" xml:space="preserve">1109.</note>
            minuitur, & </s>
            <s xml:id="echoid-s17033" xml:space="preserve">in Zenit nulla eſt.</s>
            <s xml:id="echoid-s17034" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s17035" xml:space="preserve">Altitudo apparens ſiderum, mutatur etiam ex aliâ cauſâ,
              <lb/>
            quæ reſpectu omnium corporum Cœleſtium indeſcrimina-
              <lb/>
            tim locum habet. </s>
            <s xml:id="echoid-s17036" xml:space="preserve">Ex Atmoſphæræ refractione radii infle-
              <lb/>
              <note position="left" xlink:label="note-0660-03" xlink:href="note-0660-03a" xml:space="preserve">1110.</note>
            ctuntur , & </s>
            <s xml:id="echoid-s17037" xml:space="preserve">Sidera altiora apparent ; </s>
            <s xml:id="echoid-s17038" xml:space="preserve">quo tamen
              <note position="left" xlink:label="note-0660-04" xlink:href="note-0660-04a" xml:space="preserve">1111.</note>
            ſunt, eo minor eſt hæc inflectio ; </s>
            <s xml:id="echoid-s17039" xml:space="preserve">quia radii minus
              <note symbol="*" position="left" xlink:label="note-0660-05" xlink:href="note-0660-05a" xml:space="preserve">1056.</note>
              <note symbol="*" position="left" xlink:label="note-0660-06" xlink:href="note-0660-06a" xml:space="preserve">624.</note>
              <note symbol="*" position="left" xlink:label="note-0660-07" xlink:href="note-0660-07a" xml:space="preserve">639.</note>
            in Atmoſphæræ ſuperficiem incidunt. </s>
            <s xml:id="echoid-s17040" xml:space="preserve">In Zenit refractio
              <lb/>
              <note position="left" xlink:label="note-0660-08" xlink:href="note-0660-08a" xml:space="preserve">1112.</note>
            nulla eſt ; </s>
            <s xml:id="echoid-s17041" xml:space="preserve">etiam ad diſtantiam viginti, aut triginta,
              <note symbol="*" position="left" xlink:label="note-0660-09" xlink:href="note-0660-09a" xml:space="preserve">629.</note>
            duum à Zenit ſenſibilis non eſt.</s>
            <s xml:id="echoid-s17042" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s17043" xml:space="preserve">Cùm ex hac refractione Sidera eleventur, viſibilia ſunt
              <lb/>
              <note position="left" xlink:label="note-0660-10" xlink:href="note-0660-10a" xml:space="preserve">1113.</note>
            antequam ad horizontem perveniant.</s>
            <s xml:id="echoid-s17044" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s17045" xml:space="preserve">Hæc omnia generaliter Telluris ſuperficies ſpectant, hu-
              <lb/>
              <note position="left" xlink:label="note-0660-11" xlink:href="note-0660-11a" xml:space="preserve">
                <emph style="sc">TAB. XXIV</emph>
              .</note>
            jus variæ partes nunc ſunt examinandæ: </s>
            <s xml:id="echoid-s17046" xml:space="preserve">determinantur hæ,
              <lb/>
              <note position="left" xlink:label="note-0660-12" xlink:href="note-0660-12a" xml:space="preserve">fig. 2.</note>
            referendo ad Tellurem varios circulos, quos in cœlis antea
              <lb/>
            conſideravimus; </s>
            <s xml:id="echoid-s17047" xml:space="preserve">ſic in Tellure conſideramus Æquatorem,
              <lb/>
              <note position="left" xlink:label="note-0660-13" xlink:href="note-0660-13a" xml:space="preserve">1114.</note>
            Meridianos, Tropicos, circulos Polares; </s>
            <s xml:id="echoid-s17048" xml:space="preserve">quibus circulis eo-
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            dem modo Telluris ſuperficies dividitur, ac, circulis in cœ-
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            lis, ſphæra ſtellarum fixarum: </s>
            <s xml:id="echoid-s17049" xml:space="preserve">Quare circuli hi ita ſibi mu-
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            tuo reſpondent, ut ductâ lineâ ex centro Telluris ad circu-
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            lum in cœlis, hæc per circulum in Tellure tranſeat. </s>
            <s xml:id="echoid-s17050" xml:space="preserve">Si po-
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            li fuerint P, p, Æquator erit E e, Tropici T T, t t, cir-
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            culi polares A A, a a.</s>
            <s xml:id="echoid-s17051" xml:space="preserve"/>
          </p>
        </div>
        <div xml:id="echoid-div2611" type="section" level="1" n="657">
          <head xml:id="echoid-head849" xml:space="preserve">
            <emph style="sc">Definitio</emph>
          12.</head>
          <p>
            <s xml:id="echoid-s17052" xml:space="preserve">Meridianus Loci dicitur ille, qui per locum ipſum tranſit.</s>
            <s xml:id="echoid-s17053" xml:space="preserve"/>
          </p>
          <note position="left" xml:space="preserve">1115.</note>
          <p>
            <s xml:id="echoid-s17054" xml:space="preserve">Hujus planum ad Horizontem eſt perpendiculare; </s>
            <s xml:id="echoid-s17055" xml:space="preserve">quia
              <lb/>
              <note position="left" xlink:label="note-0660-15" xlink:href="note-0660-15a" xml:space="preserve">1116.</note>
            per centrum Telluris & </s>
            <s xml:id="echoid-s17056" xml:space="preserve">ſpectatorem tranſit.</s>
            <s xml:id="echoid-s17057" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s17058" xml:space="preserve">Linea Meridiana in Loco quocunque ducta, eſt pars Meri-
              <lb/>
              <note position="left" xlink:label="note-0660-16" xlink:href="note-0660-16a" xml:space="preserve">1117.</note>
            diani Loci .</s>
            <s xml:id="echoid-s17059" xml:space="preserve"/>
          </p>
          <note symbol="*" position="left" xml:space="preserve">1101.</note>
        </div>
        <div xml:id="echoid-div2614" type="section" level="1" n="658">
          <head xml:id="echoid-head850" xml:space="preserve">
            <emph style="sc">Definitio</emph>
          13.</head>
          <p>
            <s xml:id="echoid-s17060" xml:space="preserve">Latitudo Loci eſt hujus diſtantia ab Æquatore, id eſt,
              <lb/>
              <note position="left" xlink:label="note-0660-18" xlink:href="note-0660-18a" xml:space="preserve">1118.</note>
            arcus interceptus inter Locum & </s>
            <s xml:id="echoid-s17061" xml:space="preserve">Æquatorem.</s>
            <s xml:id="echoid-s17062" xml:space="preserve"/>
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